Over the past few years, Twitter user @Ben_On_The_Moon has photographed his chain link fence due to a mysterious weathering pattern that has caused groups of concentric rings to appear on the upper side of the fence’s segments. His macro photographs emphasize the intriguing apparitions, which appear like miniature crop circles on the metal bars. Despite his research, he has not discovered the specific cause of the pattern. You can see more of @Ben_On_The_Moon’s documentation of the curious phenomena on Twitter. More